<!DOCTYPE html>
<html lang="zh-cn">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>树</title>
    <style>
        .box{
            width: 300px;
            height: 545px;
            margin: 150px auto 0 auto;
            border: 1px red transparent;
        }
        .box .leaf1{
            width: 0;
            height: 0;
            border: 50px solid transparent;
            margin: 0 auto 0;
            border-top: none;
            border-bottom-color: #38fb02;
        }
        .box .leaf2{
            width: 0;
            height: 0;
            border: 100px solid transparent;
            margin: -12px auto 0;
            border-top: none;
            border-bottom-color: #3ff079;
        }
        .box .leaf3{
            width: 0;
            height: 0;
            border: 150px solid transparent;
            margin: -45px auto 0;
            border-top: none;
            border-bottom-color: #1a7622;
        }
        .box .trunk{
            width: 35px;
            height: 220px;
            margin: auto;
            background: #31cd39;
        }
        .box .flowerpot{
            width: 220px;
            height: 50px;
            background: #e8fffea4;
            border-width: 45px 10px;
            border-color: #dafefe73 #b25c58 #b25c58;
            border-style: solid;
            margin: -60px auto 0;
        }
    </style>
</head>
<body>
    <div class="box">
        <div class="leaf1"></div>
        <div class="leaf2"></div>
        <div class="leaf3"></div>
        <div class="trunk"></div>
        <div class="flowerpot"></div>
    </div>
</body>
</html>